Visual orbit of the low-mass binary GJ 164 AB

Frantz Martinache, Barbara Rojas-Ayala, Michael J. Ireland, James P. Lloyd, Peter G. Tuthill

Resultado de la investigación: Contribución a una revistaArtículo

27 Citas (Scopus)

Resumen

We report seven successful observations of the astrometric binary GJ 164 AB system with aperture masking interferometry. The companion, with a near-infrared contrast of 5:1 was detected beyond the formal diffraction limit. Combined with astrometric observations from the literature, these observations fix the parallax of the system, and allow a model-independent mass determination of both components.We find the mass of GJ 164 B to be 0.096±0.008M . With data taken with the newly commissioned TripleSpec spectrograph, we examine GJ 164's near-infrared spectral features and compare them to a sample of M dwarfs of known metallicity. Models are not consistent with color and mass, requiring a very young age to accommodate a secondary too luminous, a scenario ruled out by the kinematics.

Idioma originalInglés
Páginas (desde-hasta)1183-1190
Número de páginas8
PublicaciónAstrophysical Journal
Volumen695
N.º2
DOI
EstadoPublicada - 20 abr 2009

Áreas temáticas de ASJC Scopus

  • Física nuclear y de alta energía
  • Ciencias planetarias y espacial
  • Astronomía y astrofísica

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    Martinache, F., Rojas-Ayala, B., Ireland, M. J., Lloyd, J. P., & Tuthill, P. G. (2009). Visual orbit of the low-mass binary GJ 164 AB. Astrophysical Journal, 695(2), 1183-1190. https://doi.org/10.1088/0004-637X/695/2/1183